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A type of Davy lamp with apertures for gauging flame height. The lamp consists of a wick lamp with the flame enclosed inside a mesh screen. The screen acts as a flame arrestor; air (and any firedamp present) can pass through the mesh freely enough to support combustion, but the holes are too fine to allow a flame to propagate through them and ignite any firedamp outside the mesh.
Davy used a fine wire gauze with a mesh of 784 holes per square inch (28 mesh). The required fineness of the mesh was scrutinised by the Miners' Lamp Committee in 1924, 109 years after Davy's work, and a recommendation to use a coarser mesh of 400 holes/sq in (20 mesh) of 27SWG wire was made. Lamps tested were as safe, and illumination ...
Portrait of Sir Humphry Davy is an 1821 portrait painting by the British artist Thomas Lawrence. It depicts the scientist Sir Humphry Davy , president of the Royal Society . Davy is known for the invention of the Davy Lamp and isolating a number of elements using electricity .
The first gas detector in the industrial age was the flame safety lamp (or Davy lamp) was invented by Sir Humphry Davy (of England) in 1815 to detect the presence of methane (firedamp) in underground coal mines. The flame safety lamp consisted of an oil flame adjusted to specific height in fresh air.
The Davey Safety Lamp was made in London by Humphry Davy. George Stephenson invented a similar lamp but Davys invention was safer due to it having a fine wire gauze that surrounded the flame. This enabled the light to pass through and reduced the risk of explosion by stopping the "firedamp" methane gas coming in contact with the flame.
Created Date: 8/30/2012 4:52:52 PM
gridcaha/istockphotoThe allure of Hollywood memorabilia has been known to transcend generations, with props, costumes, and artifacts used by famous actors fetching astronomical prices at auction.
It also led Sir Humphry Davy to devise another safety lamp, the Davy lamp, in which the flame was surrounded by iron gauze. The gauze had to have small spaces so that a flame could not pass through, but could admit methane, which then burned harmlessly inside the lamp. The height of the luminous cone above the flame gave a measure of the ...